add debugfs support for displaying kunit test suite results; this is
especially useful for module-loaded tests to allow disentangling of
test result display from other dmesg events.
Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
---
include/kunit/test.h | 21 ++++++++---
lib/kunit/Makefile | 3 +-
lib/kunit/debugfs.c | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++
lib/kunit/debugfs.h | 16 ++++++++
lib/kunit/test.c | 85 ++++++++++++++++++++++++++++++-----------
5 files changed, 202 insertions(+), 27 deletions(-)
create mode 100644 lib/kunit/debugfs.c
create mode 100644 lib/kunit/debugfs.h
diff --git a/include/kunit/test.h b/include/kunit/test.h
index 2dfb550..37219b8a 100644
--- a/include/kunit/test.h
+++ b/include/kunit/test.h
@@ -125,6 +125,8 @@ struct kunit_case {
bool success;
};
+#define kunit_status2str(status) (status ? "ok" : "not ok")
+
/**
* KUNIT_CASE - A helper for creating a &struct kunit_case
*
@@ -157,6 +159,9 @@ struct kunit_suite {
int (*init)(struct kunit *test);
void (*exit)(struct kunit *test);
struct kunit_case *test_cases;
+
+ /* private - internal use only */
+ struct dentry *debugfs;
};
/**
@@ -197,6 +202,15 @@ struct kunit {
int kunit_run_tests(struct kunit_suite *suite);
+size_t kunit_suite_num_test_cases(struct kunit_suite *suite);
+
+unsigned int kunit_test_case_num(struct kunit_suite *suite,
+ struct kunit_case *test_case);
+
+int __kunit_test_suites_init(struct kunit_suite **suites);
+
+void __kunit_test_suites_exit(struct kunit_suite **suites);
+
/**
* kunit_test_suites() - used to register one or more &struct kunit_suite
* with KUnit.
@@ -226,15 +240,12 @@ struct kunit {
static struct kunit_suite *suites[] = { __VA_ARGS__, NULL}; \
static int kunit_test_suites_init(void) \
{ \
- unsigned int i; \
- for (i = 0; suites[i] != NULL; i++) \
- kunit_run_tests(suites[i]); \
- return 0; \
+ return __kunit_test_suites_init(suites); \
} \
late_initcall(kunit_test_suites_init); \
static void __exit kunit_test_suites_exit(void) \
{ \
- return; \
+ return __kunit_test_suites_exit(suites); \
} \
module_exit(kunit_test_suites_exit)
diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile
index fab5564..869aab0 100644
--- a/lib/kunit/Makefile
+++ b/lib/kunit/Makefile
@@ -3,7 +3,8 @@ obj-$(CONFIG_KUNIT) += kunit.o
kunit-objs += test.o \
string-stream.o \
assert.o \
- try-catch.o
+ try-catch.o \
+ debugfs.o
obj-$(CONFIG_KUNIT_TEST) += kunit-test.o
diff --git a/lib/kunit/debugfs.c b/lib/kunit/debugfs.c
new file mode 100644
index 0000000..578843c
--- /dev/null
+++ b/lib/kunit/debugfs.c
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates.
+ * Author: Alan Maguire <alan.maguire@xxxxxxxxxx>
+ */
+
+#include <linux/debugfs.h>
+#include <linux/module.h>
+
+#include <kunit/test.h>
+
+#include "string-stream.h"
+
+#define KUNIT_DEBUGFS_ROOT "kunit"
+#define KUNIT_DEBUGFS_RESULTS "results"
+
+/*
+ * Create a debugfs representation of test suites:
+ *
+ * Path Semantics
+ * /sys/kernel/debug/kunit/<testsuite>/results Show results of last run for
+ * testsuite
+ *
+ */
+
+static struct dentry *debugfs_rootdir;
+
+void kunit_debugfs_cleanup(void)
+{
+ debugfs_remove_recursive(debugfs_rootdir);
+}
+
+void kunit_debugfs_init(void)
+{
+ if (!debugfs_rootdir)
+ debugfs_rootdir = debugfs_create_dir(KUNIT_DEBUGFS_ROOT, NULL);
+}
+
+static void debugfs_print_result(struct seq_file *seq,
+ struct kunit_suite *suite,
+ struct kunit_case *test_case)
+{
+ if (!test_case)
+ return;
+
+ seq_printf(seq, "\t%s %d - %s\n", kunit_status2str(test_case->success),
+ kunit_test_case_num(suite, test_case), test_case->name);
+}
+
+/*
+ * /sys/kernel/debug/kunit/<testsuite>/results shows all results for testsuite.
+ */
+static int debugfs_print_results(struct seq_file *seq, void *v)
+{
+ struct kunit_suite *suite = (struct kunit_suite *)seq->private;
+ struct kunit_case *test_case;
+
+ if (!suite)
+ return 0;
+
+ seq_printf(seq, "\t# Subtest: %s\n", suite->name);
+ seq_printf(seq, "\t1..%zd\n", kunit_suite_num_test_cases(suite));
+
+ for (test_case = suite->test_cases; test_case->run_case; test_case++)
+ debugfs_print_result(seq, suite, test_case);
+
+ return 0;
+}
+
+static int debugfs_release(struct inode *inode, struct file *file)
+{
+ return single_release(inode, file);
+}
+
+static int debugfs_results_open(struct inode *inode, struct file *file)
+{
+ struct kunit_suite *suite;
+
+ suite = (struct kunit_suite *)inode->i_private;
+
+ return single_open(file, debugfs_print_results, suite);
+}
+
+static const struct file_operations debugfs_results_fops = {
+ .open = debugfs_results_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = debugfs_release,
+};
+
+void kunit_debugfs_create_suite(struct kunit_suite *suite)
+{
+ /* First add /sys/kernel/debug/kunit/<testsuite> */
+ suite->debugfs = debugfs_create_dir(suite->name, debugfs_rootdir);
+
+ debugfs_create_file(KUNIT_DEBUGFS_RESULTS, S_IFREG | 0444,
+ suite->debugfs,
+ suite, &debugfs_results_fops);
+}
+
+void kunit_debugfs_destroy_suite(struct kunit_suite *suite)
+{
+ debugfs_remove_recursive(suite->debugfs);
+}
diff --git a/lib/kunit/debugfs.h b/lib/kunit/debugfs.h
new file mode 100644
index 0000000..9a92d5e
--- /dev/null
+++ b/lib/kunit/debugfs.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020, Oracle and/or its affiliates.
+ */
+
+#ifndef _KUNIT_DEBUGFS_H
+#define _KUNIT_DEBUGFS_H
+
+#include <kunit/test.h>
+
+void kunit_debugfs_create_suite(struct kunit_suite *suite);
+void kunit_debugfs_destroy_suite(struct kunit_suite *suite);
+void kunit_debugfs_init(void);
+void kunit_debugfs_cleanup(void);
+
+#endif /* _KUNIT_DEBUGFS_H */
diff --git a/lib/kunit/test.c b/lib/kunit/test.c
index 9242f93..07089ca 100644
--- a/lib/kunit/test.c
+++ b/lib/kunit/test.c
@@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/sched/debug.h>
+#include "debugfs.h"
#include "string-stream.h"
#include "try-catch-impl.h"
@@ -28,22 +29,24 @@ static void kunit_print_tap_version(void)
}
}
-static size_t kunit_test_cases_len(struct kunit_case *test_cases)
+size_t kunit_suite_num_test_cases(struct kunit_suite *suite)
{
- struct kunit_case *test_case;
+ struct kunit_case *test_case, *test_cases = suite->test_cases;
size_t len = 0;
- for (test_case = test_cases; test_case->run_case; test_case++)
+ for (test_case = test_cases; test_case && test_case->run_case;
+ test_case++)
len++;
return len;
}
+EXPORT_SYMBOL_GPL(kunit_suite_num_test_cases);
static void kunit_print_subtest_start(struct kunit_suite *suite)
{
kunit_print_tap_version();
pr_info("\t# Subtest: %s\n", suite->name);
- pr_info("\t1..%zd\n", kunit_test_cases_len(suite->test_cases));
+ pr_info("\t1..%zd\n", kunit_suite_num_test_cases(suite));
}
static void kunit_print_ok_not_ok(bool should_indent,
@@ -51,19 +54,15 @@ static void kunit_print_ok_not_ok(bool should_indent,
size_t test_number,
const char *description)
{
- const char *indent, *ok_not_ok;
+ const char *indent;
if (should_indent)
indent = "\t";
else
indent = "";
- if (is_ok)
- ok_not_ok = "ok";
- else
- ok_not_ok = "not ok";
-
- pr_info("%s%s %zd - %s\n", indent, ok_not_ok, test_number, description);
+ pr_info("%s%s %zd - %s\n", indent, kunit_status2str(is_ok),
+ test_number, description);
}
static bool kunit_suite_has_succeeded(struct kunit_suite *suite)
@@ -87,14 +86,20 @@ static void kunit_print_subtest_end(struct kunit_suite *suite)
suite->name);
}
-static void kunit_print_test_case_ok_not_ok(struct kunit_case *test_case,
- size_t test_number)
+unsigned int kunit_test_case_num(struct kunit_suite *suite,
+ struct kunit_case *test_case)
{
- kunit_print_ok_not_ok(true,
- test_case->success,
- test_number,
- test_case->name);
+ struct kunit_case *tc;
+ unsigned int i;
+
+ for (i = 1, tc = suite->test_cases; tc->run_case; tc++, i++) {
+ if (tc == test_case)
+ return i;
+ }
+
+ return 0;
}
+EXPORT_SYMBOL_GPL(kunit_test_case_num);
static void kunit_print_string_stream(struct kunit *test,
struct string_stream *stream)
@@ -102,6 +107,9 @@ static void kunit_print_string_stream(struct kunit *test,
struct string_stream_fragment *fragment;
char *buf;
+ if (string_stream_is_empty(stream))
+ return;
+
buf = string_stream_get_string(stream);
if (!buf) {
kunit_err(test,
@@ -303,19 +311,20 @@ static void kunit_run_case_catch_errors(struct kunit_suite *suite,
kunit_try_catch_run(try_catch, &context);
test_case->success = test.success;
+
+ kunit_print_ok_not_ok(true, test_case->success,
+ kunit_test_case_num(suite, test_case),
+ test_case->name);
}
int kunit_run_tests(struct kunit_suite *suite)
{
struct kunit_case *test_case;
- size_t test_case_count = 1;
kunit_print_subtest_start(suite);
- for (test_case = suite->test_cases; test_case->run_case; test_case++) {
+ for (test_case = suite->test_cases; test_case->run_case; test_case++)
kunit_run_case_catch_errors(suite, test_case);
- kunit_print_test_case_ok_not_ok(test_case, test_case_count++);
- }
kunit_print_subtest_end(suite);
@@ -323,6 +332,37 @@ int kunit_run_tests(struct kunit_suite *suite)
}
EXPORT_SYMBOL_GPL(kunit_run_tests);
+static void kunit_init_suite(struct kunit_suite *suite)
+{
+ kunit_debugfs_create_suite(suite);
+}
+
+int __kunit_test_suites_init(struct kunit_suite **suites)
+{
+ unsigned int i;
+
+ for (i = 0; suites[i] != NULL; i++) {
+ kunit_init_suite(suites[i]);
+ kunit_run_tests(suites[i]);
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__kunit_test_suites_init);
+
+static void kunit_exit_suite(struct kunit_suite *suite)
+{
+ kunit_debugfs_destroy_suite(suite);
+}
+
+void __kunit_test_suites_exit(struct kunit_suite **suites)
+{
+ unsigned int i;
+
+ for (i = 0; suites[i] != NULL; i++)
+ kunit_exit_suite(suites[i]);
+}
+EXPORT_SYMBOL_GPL(__kunit_test_suites_exit);
+
struct kunit_resource *kunit_alloc_and_get_resource(struct kunit *test,
kunit_resource_init_t init,
kunit_resource_free_t free,
@@ -489,12 +529,15 @@ void kunit_cleanup(struct kunit *test)
static int __init kunit_init(void)
{
+ kunit_debugfs_init();
+
return 0;
}
late_initcall(kunit_init);
static void __exit kunit_exit(void)
{
+ kunit_debugfs_cleanup();
}
module_exit(kunit_exit);
--
1.8.3.1
